Please name candidates for a possible BLACKLIST.json entries

Please add things that can be removed to get more vars and heap

This is an example form JumJum to explain how a blacklist works

exclude high math functions:

[{"class": "E","name": "FFT"}
,{"class": "E","name": "convolve"}
,{"class": "E","name": "interpolate"}
,{"class": "E","name": "interpolate2d"}
,{"class": "E","name": "variance"}
]

or peek and poke stuff

,{"class": "","name": "peek16"}
,{"class": "","name": "peek32"}
,{"class": "","name": "peek8"}
,{"class": "","name": "poke16"}
,{"class": "","name": "poke32"}
,{"class": "","name": "poke8"}

or

,{"class": "E","name": "asm"}
,{"class": "E","name": "compiledC"}

or

.......

The scripts/find_big_ram/rom scripts could be handy here.

Afaik peek/poke really don't use much. Neither do asm/compiledC since they're basically placeholders and all the heavy lifting is done on the PC

Dropping Graphics would be a big one if it's not being used.

The scripts/find_big_ram/rom scripts could be handy here.

Good point - thanks

Just added Waveform to the blacklist like this {"class":"Waveform","name":"*"}

compiled

make clean && BLACKLIST=BLACKLIST.json  make

and checked with

xtensa-lx106-elf-objdump -d -l -x espruino_esp8266_user1.elf | grep -i Waveform

expected no return, but got about 350 lines back.

Any hint what goes wrong on my site?

402714f0 l     O .irom0.text	00000018 jswSymbols_Waveform_proto
4026c650 l     O .irom0.text	0000001d jswSymbols_Waveform_proto_str
00000000 l    df *ABS*	00000000 jswrap_waveform.c
40242928 l     F .irom0.text	0000006b jswrap_waveform_getBuffer
402429c4 l     F .irom0.text	000001c5 jswrap_waveform_start
40242d9c g     F .irom0.text	000000e6 jswrap_waveform_constructor
40242ef0 g     F .irom0.text	0000004e jswrap_waveform_stop
40242e84 g     F .irom0.text	00000014 jswrap_waveform_startOutput
40242b98 g     F .irom0.text	00000168 jswrap_waveform_idle
. . . . .

/Espruino/repos/MaBecker/src/jswrap_waveform.c:305
4024c6ca:	d90561        	l32r	a6, 40242ae0 <jswrap_waveform_start+0x11c>
4026c650 <jswSymbols_Waveform_proto_str>:
4026d050:	0079 6157 6576 6f66 6d72 6100 616e 6f6c     y.Waveform.analo
4027008c:	6157 6576 6f66 6d72 6320 756f 646c 276e     Waveform couldn'
402700ac:	6157 6576 6f66 6d72 6920 2073 6f6e 2074     Waveform is not 
40270144:	6157 6576 6f66 6d72 6920 2073 6c61 6572     Waveform is alre
402701d0:	6157 6576 6f66 6d72 6320 756f 646c 276e     Waveform couldn'

Wow, there are still many strings that have not been moved to flash in the ESP8266 coding sections.

Question: Are blacklist entries get removed from firmware during ‘make’ or just disabled?

I believe the blacklist entries get removed from gen/jswrapper.c (you can check that file easily) - they then won't be referenced and should be optimised out.

But I wonder if you're compiling with RELEASE=1? If not the optimisations may not happen

The scripts/find_big_ram/rom scripts could be handy here.

not output for ESP8266, but there is make topstrings and topreadonly

But I wonder if you're compiling with RELEASE=1? If not the optimisations may not happen

Yes, as export RELEASE=1 is a part of my default environment ;-)

Try a simple BLACKLIST.json[{"class":"Waveform","name":"*"}]

make clean && BLACKLIST=BLACKLIST.json make

grep -i waveform gen/jswrapper.c

Result:

see attached file

1 Attachment

• grep_result.txt

Maybe @JumJum could provide some ideas? the BLACKLIST.json is his addition to the build system.

You could always check out his EFEU project and see what it writes into the blacklist file.

MaBe,
there is a not fully tested change in py file, to support wildcard.
This change is used today in efeu only.
For now in your environment you could add all functions to blacklist instead of using wildcard